diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 24a76365b715..2cd0a70e57c9 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -3410,3 +3410,42 @@ with haskellLib;
     ];
   }
 )
+
+# 2026-04-01: IHP packages need hasql >= 1.10 (via hasql-mapping).
+# The scope renames hasql-stack attrs to the 1.10 line and unmarks
+# hasql-mapping, which only builds against hasql >= 1.10 and so stays
+# broken at the top level. dontCheck for tests that need a live
+# PostgreSQL lives in configuration-nix.nix on the versioned attrs.
+// (
+  let
+    ihpHasqlScope = self: super: {
+      hasql = doDistribute super.hasql_1_10_3;
+      hasql-dynamic-statements = doDistribute super.hasql-dynamic-statements_0_5_1;
+      hasql-notifications = doDistribute super.hasql-notifications_0_2_5_0;
+      hasql-pool = doDistribute super.hasql-pool_1_4_2;
+      hasql-transaction = doDistribute super.hasql-transaction_1_2_2;
+      postgresql-binary = doDistribute super.postgresql-binary_0_15_0_1;
+      text-builder = doDistribute super.text-builder_1_0_0_5;
+      hasql-mapping = doDistribute (unmarkBroken super.hasql-mapping);
+      postgresql-simple-postgresql-types = doDistribute (
+        unmarkBroken super.postgresql-simple-postgresql-types
+      );
+    };
+
+    ihpPackages = [
+      "ihp"
+      "ihp-datasync"
+      "ihp-graphql"
+      "ihp-hspec"
+      "ihp-ide"
+      "ihp-job-dashboard"
+      "ihp-migrate"
+      "ihp-pglistener"
+      "ihp-ssc"
+      "ihp-typed-sql"
+    ];
+  in
+  lib.genAttrs ihpPackages (
+    name: haskellLib.doDistribute (haskellLib.unmarkBroken (super.${name}.overrideScope ihpHasqlScope))
+  )
+)
diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index feee4403b436..eae4e1c104f6 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -1553,6 +1553,14 @@ builtins.intersectAttrs super {
   # only test suite is testcontainers/docker-based
   postgresql-simple-postgresql-types = dontCheck super.postgresql-simple-postgresql-types;
 
+  # hasql 1.10 stack used by IHP — tests need a live PostgreSQL / docker
+  hasql_1_10_3 = dontCheck super.hasql_1_10_3;
+  hasql-dynamic-statements_0_5_1 = dontCheck super.hasql-dynamic-statements_0_5_1;
+  hasql-notifications_0_2_5_0 = dontCheck super.hasql-notifications_0_2_5_0;
+  hasql-pool_1_4_2 = dontCheck super.hasql-pool_1_4_2;
+  hasql-transaction_1_2_2 = dontCheck super.hasql-transaction_1_2_2;
+  postgresql-binary_0_15_0_1 = dontCheck super.postgresql-binary_0_15_0_1;
+
   users-postgresql-simple = lib.pipe super.users-postgresql-simple [
     (addTestToolDepends [
       pkgs.postgresql